It would be like RPing as a mage that was focused solely on time magic, which works with alter time, time warp, slow, and temporal shield. This would, of coarse, have to have the bronze dragon flight involved, so the time-wizard could be a member or former member of http://www.wowpedia.org/Timewalkers. They could also be a person that got lost in time and was saved and taught by the bronze dragon flight, or helped the bronze in exchange for knowledge, ect. I think it could be very interesting and even fit into current lore in some ways.
Please give me your honest opinion on my idea! :)